CVE-2021-36976
MEDIUM
6.5
CVSS Score
Published: July 20, 2021 at 06:49 AM UTC
Updated: June 17, 2026 at 03:59 AM UTC
7 products affected across 4 vendorsmacOSFedoraiPhone OS
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Severity
MEDIUM6.5
Exploit prediction
EPSS 3%
Description
libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block).
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 15.4
Affected range stops below 15.4, so it looks safe — our inference, not a vendor statement
v < 15.4
Affected range stops below 15.4, so it looks safe — our inference, not a vendor statement
v < 12.3
Affected range stops below 12.3, so it looks safe — our inference, not a vendor statement
v < 8.5
Affected range stops below 8.5, so it looks safe — our inference, not a vendor statement
95%
3.4.1 ≤ v ≤ 3.5.2
Affected range stops below 8.2.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.6, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (11)
Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2022/Mar/27Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2022/Mar/28Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2022/Mar/29x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32375x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libarchive/OSV-2021-557.yamlVendor Advisoryx_refsource_FEDORAMailing ListThird Party Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SE5NJQNM22ZE5Z55LPAGCUHSBQZBKMKC/Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202208-26x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://support.apple.com/kb/HT213182CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-416
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